Centering construction.



PA'TBNTED SEPT. 4, 1906.

A. L'. A. HIMMBLWRIGHT; GENTERING CONSTRUCTION.

APPLIOATION FILED JUNE 9, 1905.

UNTTE STATES PATENT OFTOE.

ABRAHAM L. A. HIMMELWRIGHT, OF NEW YORK, N. Y., ASSIGNOR TO THE NEW JERSEY i/VIRE CLOTH COMPANY, OF TRENTON, NEW J EB- SEY, A CORPORATION OF NEW JERSEY.

CENTERING CONSTRUCTION.

Specification of Letters Patent.

Patented Sept. 4, 1906.

Applicatio m June 9, 1905. Serial No. 264,415.

To all whom, it may concern.-

Be it known that I, ABRAHAM L. A. HIM- MELWRIGHT, a citizen of the United States, residing at New York, county of New York, and State of New York, have invented certain new and useful Improvements in Centering Construction, fully described and represented in the following specification and the accompanying drawings, forming a part of the same.

This invention relates to the construction of fireproof floors, ceilings, arches, partitions, walls, and similar structures in which a temporary framework or centering is used to support the material of the structure during the making of the same and during the setting of the concrete or other plastic material, if thestructure be made of plastic material, the object of the invention being to provide a simple, cheap, and efficient centering construction readily put in place and removed and by which the use of supporting beams, bucks, or frames, such as are usually employed for supporting the centering-boards, is avoided.

For a full understanding of the invention a detailed description of a construction of the preferred form embodying all the features of the same as applied in connection with a concrete floor will now be given in connection with the accompanying drawings, forming a part of this specification, and the features forming the invention then particularly pointed out in the claims.

In the drawings, Figure 1 is a section transversely to the beams, showing the floor before removal of the centering with the concrete omitted from part of the view. Fig. 2 is a sectional plan of Fig. 1 with the concrete removed. Fig. 3 is a section longitudinally of the beams on the line 3 of Fig. 1. Fig. 4 is a view similar to Fig. 1, showing the complete floor with the centering removed and with the usual plaster finish.

Referring to the drawings, A represents the beams, shown as of the common I form, and B the usual metal bars extending from beam to beam and acting to support and strengthen the floor concrete C. These bars are shown as similar to those of patents granted to John TV. Rapp, No. 537,483, No. 557,147, and No. 631,941, this form of bar being preferred on account of its strength and lightness; but it will be understood that bars of other forms may be used in connection with the present invention.

The floor shown is of the curvedarch form and the bars B are supported on the bottom flanges of the beam, as usual in such constructions, with spanners D, acting as convenient spacers for the bars B and to hold the bars in position, these spanners be ing shown as of a common form consisting of metal strips looped over the tops of the bars.

The invention may be used without the concrete extending about the bottom flanges of the beams; but preferably. in such concrete floors the concrete will be extended downward about the lower flanges of the beams, so as to protect the beam-flanges below the metal bars B, as shown, and the concrete on the under sides of the beams will preferably be supported by the clips :0, arranged at intervals along the beams and having arms embedded in and acting to support the concrete, as shown, and as fully described and claimed in United States Letters Patent No. 786,289, April 4, 1905.

Referring now to the centering used for supporting the concrete during filling in and setting, this centering is formed of the usual boards E, which in accordance with the present invention are secured to and supported directly from the bars B by ties 10 of wire or similar material of sul'licient strength to support the centering while adapted to be readily cut for the removal of the centering. A quick and convenient way of building the centering is that shown, in which the centering-boards E extend longitudinally of the beams and continuous wires are used for tying the centering-boards to the bars, these wires being tied around the bars at one end and then being passed successively under a centering-board, then over the bar B down ward and under the next centering-board and over the bar B, and so on as the successive centering-boards are put in position until the centering is completed. The course of the wires is shown in Fig. 2. The soflit-box, consisting of the bottom board and two side boards inclosing the bottom of the beam below the bars B, is supported by wires 10, which are passed under the soflitbox and tied about the bars B, or these wires may be continuous with the wires by which the other centering-boards are supported. It will be understood, however, that the method of applying the wireto support the centering-boards may be varied, the essential feature consisting in the support of the centering-boards directly by the bars B by ties adapted to be cut for the removal of the centering, thus avoiding all use of centering beams, frames, or complicated supporting devices for the centering-boards.

For removing the centering it is necessary only to cut the ties on the under side of the centering-boards and the whole centering will dropdirectly away from the concrete, leaving the upper portions of the ties in the concrete. If the usual plaster finish F be used, as shown in Fig. 4, the wires and clips D will be wholly covered and concealed, or the usual suspended ceiling of metal lathing and plaster may be supported from the beams below the floor and beam protection.

It will be understood that the invention is not limited to floors or other horizontal structures, but that the broader features of the invention may be applied also in building partitions or walls, the centering-boards being supported by being tied to the usual vertical wall-studs or other metal frame of the partition or wall and being removed by cutting the ties, as above described.

What I claim is 1. The combination with metal bars forming apart of a permanent framework, of a centering formed by boards extending transversely to the bars and secured directly to said bars by ties adapted to be cut to release the centering-boards for their removal.

2. The combination with metal bars forming a part of a permanent framework, of a centering formed by boards extending trans versely to the bars and secured directly to said bars by wires passed around said bars and around the successive centering-boards, whereby the centering-boards may be removed by cutting the wires.

3. The combination with beams or the like, of metal bars extending between the beams and supported thereby, a centering formed by boards extending longitudinally of the beams and on the under side of said bars and secured directly to the bars by ties adapted to be cut for the removal of the centering.

4. The combination with flanged beams, of bars extending between the beams and supported on the bottom flanges of the beams, a centering formed by boards extending longitudinally of the beams and on the under side of said bars, soflit-boxes inclosing the bottom flanges of the beams, and wire ties supporting the centering-boards and soffit-boxes directly from the metal bars.

5. The combination with the beams A, of bars B extending from beam to beam, a centering formed by boards E extending longitudinally of the beams and on the under side of the bars, and ties 10 passing around the bars and under the successive centeringboards and by which the centering-boards are supported directly from the bars.

In testimony whereof I have hereunto set my hand in the presence of two subscribing witnesses.

ABRAHAM L. A. HIMMELWRIGHT.

Witnesses:

O. J. SAWYER, J. A. GRAvEs. 

